Código:
Option Explicit
Private Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End Type
Private Type PICTDESC
size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End Type
Private Type GdiplusStartupInput
GdiplusVersion As Long
DebugEventCallback As Long
SuppressBackgroundThread As Long
SuppressExternalCodecs As Long
End Type
Private Type PWMFRect16
Left As Integer
Top As Integer
Right As Integer
Bottom As Integer
End Type
Private Type wmfPlaceableFileHeader
Key As Long
hMf As Integer
BoundingBox As PWMFRect16
Inch As Integer
Reserved As Long
CheckSum As Integer
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hDC As Long) As Long
Private Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PICTDESC, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hDC As Long, ByVal nIndex As Long) As Long
Private Declare Function PatBlt Lib "gdi32" (ByVal hDC As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal dwRop As Long) As Long
Private Declare Function CreateBitmap Lib "gdi32" (ByVal nWidth As Long, ByVal nHeight As Long, ByVal nPlanes As Long, ByVal nBitCount As Long, lpBits As Any) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Private Declare Function CreateSolidBrush Lib "gdi32" (ByVal crColor As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hDC As Long) As Long
Private Declare Function GdipLoadImageFromFile Lib "gdiplus.dll" (ByVal FileName As Long, GpImage As Long) As Long
Private Declare Function GdiplusStartup Lib "gdiplus.dll" (Token As Long, gdipInput As GdiplusStartupInput, GdiplusStartupOutput As Long) As Long
Private Declare Function GdipCreateFromHDC Lib "gdiplus.dll" (ByVal hDC As Long, GpGraphics As Long) As Long
Private Declare Function GdipSetInterpolationMode Lib "gdiplus.dll" (ByVal Graphics As Long, ByVal InterMode As Long) As Long
Private Declare Function GdipDrawImageRectI Lib "gdiplus.dll" (ByVal Graphics As Long, ByVal Img As Long, ByVal X As Long, ByVal Y As Long, ByVal Width As Long, ByVal Height As Long) As Long
Private Declare Function GdipDeleteGraphics Lib "gdiplus.dll" (ByVal Graphics As Long) As Long
Private Declare Function GdipDisposeImage Lib "gdiplus.dll" (ByVal Image As Long) As Long
Private Declare Function GdipCreateBitmapFromHBITMAP Lib "gdiplus.dll" (ByVal hBmp As Long, ByVal hPal As Long, GpBitmap As Long) As Long
Private Declare Function GdipGetImageWidth Lib "gdiplus.dll" (ByVal Image As Long, Width As Long) As Long
Private Declare Function GdipGetImageHeight Lib "gdiplus.dll" (ByVal Image As Long, Height As Long) As Long
Private Declare Function GdipCreateMetafileFromWmf Lib "gdiplus.dll" (ByVal hWmf As Long, ByVal deleteWmf As Long, WmfHeader As wmfPlaceableFileHeader, Metafile As Long) As Long
Private Declare Function GdipCreateMetafileFromEmf Lib "gdiplus.dll" (ByVal hEmf As Long, ByVal deleteEmf As Long, Metafile As Long) As Long
Private Declare Function GdipCreateBitmapFromHICON Lib "gdiplus.dll" (ByVal hIcon As Long, GpBitmap As Long) As Long
Private Declare Function GdipDrawImageRectRectI Lib "gdiplus.dll" (ByVal Graphics As Long, ByVal GpImage As Long, ByVal dstx As Long, ByVal dsty As Long, ByVal dstwidth As Long, ByVal dstheight As Long, ByVal srcx As Long, ByVal srcy As Long, ByVal srcwidth As Long, ByVal srcheight As Long, ByVal srcUnit As Long, ByVal imageAttributes As Long, ByVal callback As Long, ByVal callbackData As Long) As Long
Private Declare Sub GdiplusShutdown Lib "gdiplus.dll" (ByVal Token As Long)
Private Const PLANES = 14
Private Const BITSPIXEL = 12
Private Const PATCOPY = &HF00021
Private Const PICTYPE_BITMAP = 1
Private Const InterpolationModeHighQualityBicubic = 7
Private Const GDIP_WMF_PLACEABLEKEY = &H9AC6CDD7
Private Const UnitPixel = 2
Public Function InitGDIPlus() As Long
Dim Token As Long
Dim gdipInit As GdiplusStartupInput
gdipInit.GdiplusVersion = 1
GdiplusStartup Token, gdipInit, ByVal 0&
InitGDIPlus = Token
End Function
Public Sub FreeGDIPlus(Token As Long)
GdiplusShutdown Token
End Sub
Public Function LoadPictureGDIPlus(PicFile As String, Optional Width As Long = -1, Optional Height As Long = -1, Optional ByVal BackColor As Long = vbWhite, Optional RetainRatio As Boolean = False) As IPicture
Dim hDC As Long
Dim hBitmap As Long
Dim Img As Long
If GdipLoadImageFromFile(StrPtr(PicFile), Img) <> 0 Then
Err.Raise 999, "GDI+ Module", "Error loading picture " & PicFile
Exit Function
End If
If Width = -1 Or Height = -1 Then
GdipGetImageWidth Img, Width
GdipGetImageHeight Img, Height
End If
InitDC hDC, hBitmap, BackColor, Width, Height
gdipResize Img, hDC, Width, Height, RetainRatio
GdipDisposeImage Img
GetBitmap hDC, hBitmap
Set LoadPictureGDIPlus = CreatePicture(hBitmap)
End Function
Private Sub InitDC(hDC As Long, hBitmap As Long, BackColor As Long, Width As Long, Height As Long)
Dim hBrush As Long
hDC = CreateCompatibleDC(ByVal 0&)
hBitmap = CreateBitmap(Width, Height, GetDeviceCaps(hDC, PLANES), GetDeviceCaps(hDC, BITSPIXEL), ByVal 0&)
hBitmap = SelectObject(hDC, hBitmap)
hBrush = CreateSolidBrush(BackColor)
hBrush = SelectObject(hDC, hBrush)
PatBlt hDC, 0, 0, Width, Height, PATCOPY
DeleteObject SelectObject(hDC, hBrush)
End Sub
Private Sub gdipResize(Img As Long, hDC As Long, Width As Long, Height As Long, Optional RetainRatio As Boolean = False)
Dim Graphics As Long
Dim OrWidth As Long
Dim OrHeight As Long
Dim OrRatio As Double
Dim DesRatio As Double
Dim DestX As Long
Dim DestY As Long
Dim DestWidth As Long
Dim DestHeight As Long
GdipCreateFromHDC hDC, Graphics
GdipSetInterpolationMode Graphics, InterpolationModeHighQualityBicubic
If RetainRatio Then
GdipGetImageWidth Img, OrWidth
GdipGetImageHeight Img, OrHeight
OrRatio = OrWidth / OrHeight
DesRatio = Width / Height
DestWidth = IIf(DesRatio < OrRatio, Width, Height * OrRatio)
DestHeight = IIf(DesRatio < OrRatio, Width / OrRatio, Height)
DestX = (Width - DestWidth) / 2
DestY = (Height - DestHeight) / 2
GdipDrawImageRectRectI Graphics, Img, DestX, DestY, DestWidth, DestHeight, 0, 0, OrWidth, OrHeight, UnitPixel, 0, 0, 0
Else
GdipDrawImageRectI Graphics, Img, 0, 0, Width, Height
End If
GdipDeleteGraphics Graphics
End Sub
Private Sub GetBitmap(hDC As Long, hBitmap As Long)
hBitmap = SelectObject(hDC, hBitmap)
DeleteDC hDC
End Sub
Private Function CreatePicture(hBitmap As Long) As IPicture
Dim IID_IDispatch As GUID
Dim Pic As PICTDESC
Dim IPic As IPicture
IID_IDispatch.Data1 = &H20400
IID_IDispatch.Data4(0) = &HC0
IID_IDispatch.Data4(7) = &H46
Pic.size = Len(Pic)
Pic.Type = PICTYPE_BITMAP
Pic.hBmp = hBitmap
OleCreatePictureIndirect Pic, IID_IDispatch, True, IPic
Set CreatePicture = IPic
End Function
Public Function Resize(Handle As Long, PicType As PictureTypeConstants, Width As Long, Height As Long, Optional BackColor As Long = vbWhite, Optional RetainRatio As Boolean = False) As IPicture
Dim Img As Long
Dim hDC As Long
Dim hBitmap As Long
Dim WmfHeader As wmfPlaceableFileHeader
Select Case PicType
Case vbPicTypeBitmap
GdipCreateBitmapFromHBITMAP Handle, ByVal 0&, Img
Case vbPicTypeMetafile
FillInWmfHeader WmfHeader, Width, Height
GdipCreateMetafileFromWmf Handle, False, WmfHeader, Img
Case vbPicTypeEMetafile
GdipCreateMetafileFromEmf Handle, False, Img
Case vbPicTypeIcon
GdipCreateBitmapFromHICON Handle, Img
End Select
If Img Then
InitDC hDC, hBitmap, BackColor, Width, Height
gdipResize Img, hDC, Width, Height, RetainRatio
GdipDisposeImage Img
GetBitmap hDC, hBitmap
Set Resize = CreatePicture(hBitmap)
End If
End Function
Private Sub FillInWmfHeader(WmfHeader As wmfPlaceableFileHeader, Width As Long, Height As Long)
WmfHeader.BoundingBox.Right = Width
WmfHeader.BoundingBox.Bottom = Height
WmfHeader.Inch = 1440
WmfHeader.Key = GDIP_WMF_PLACEABLEKEY
End Sub
Sub PngImageLoad(PathFilename As String, ImageControl As Image)
Dim Token As Long
Token = InitGDIPlus
ImageControl = LoadPictureGDIPlus(PathFilename, ImageControl.Width / Screen.TwipsPerPixelX, ImageControl.Height / Screen.TwipsPerPixelY)
FreeGDIPlus Token
End Sub
Sub PngPictureLoad(PathFilename As String, PictureControl As PictureBox, AutoResize As Boolean)
Dim Token As Long
Token = InitGDIPlus
If AutoResize = False Then
PictureControl = LoadPictureGDIPlus(PathFilename)
Else
PictureControl = LoadPictureGDIPlus(PathFilename, PictureControl.ScaleWidth / Screen.TwipsPerPixelX, PictureControl.ScaleHeight / Screen.TwipsPerPixelY)
End If
FreeGDIPlus Token
End Sub